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Title Reservoir quality units in Rotliegende sandstones of north Germany
Creator/Author Kraft, T. ; Hock, M. (BEB Erdgas und Erdol GmbH, Hannover (Germany))
Publication Date1993 Sep 01
OSTI IdentifierOSTI ID: 6914806
Report Number(s)CONF-9310237--
Other Number(s)ISSN0149-1423; CODEN: AABUD2
Resource TypeConference
Specific TypeJournal Article
Resource RelationAAPG Bulletin (American Association of Petroleum Geologists) ; Vol/Issue: 77:9; American Association of Petroleum Geologists (AAPG) mid-continent section meeting; 10-12 Oct 1993; Amarillo, TX (United States)
Subject030200 -- Natural Gas-- Reserves, Geology, & Exploration; RESERVOIR ROCK-- FORECASTING;RESOURCE ASSESSMENT-- CALCULATION METHODS;SEDIMENTATION-- DATA ANALYSIS; DIAGENESIS;FEDERAL REPUBLIC OF GERMANY;MINERALOGY;NATURAL GAS;PERMEABILITY;PERMIAN PERIOD;POROSITY;SANDSTONES;SEDIMENTARY ROCKS
Related SubjectDEVELOPED COUNTRIES;ENERGY SOURCES;EUROPE;FLUIDS;FOSSIL FUELS;FUEL GAS;FUELS;GAS FUELS;GASES;GEOLOGIC AGES;PALEOZOIC ERA;ROCKS;SEDIMENTARY ROCKS;WESTERN EUROPE
Description/Abstract The major producing gas fields in the Permian Rotliegende are situated in an approximately 50 km wide, northwest-southeast-striking belt from Groningen to north Hannover.^The main Rotliegende reservoirs are shoreline and dune sediments in the Wustrow, Dethlingen, and Schneverdingen sandstones and are situated at depths between 3500 and 5000 m. Porosities range from 8-18%, with permeabilities of 0.001-800 md, depicting a strong degree of reservoir heterogeneity even at field scale.^Sedimentary facies and diagenesis are recognized as the main reservoir controlling factors.^Log-derived mineralogy and diagenesis can be calibrated to the cores and then extrapolated to the uncored intervals.^The method is based on cluster and principal component analysis and combines the whole suite of petrographical, geochemical, and petrophysical laboratory measurements with the log data.^Thereby, the diagenetic features of reservoir sandstones can be evaluated throughout the uncored intervals, and lithological variations in nonreservoir sections, fanglomerates, volcanites, and mudstones can be detected.^The sedimentary environment is interpreted mainly from dipmeter.^Eventually, the method also should reduce coring expenses.^From crossplots of log-derived diagenesis and facies parameters vs. permeability, porosity, or saturation, reservoir quality units can be identified and tied to seismic attributes.^Mapping these units allow one to better distinguish pay areas and explain failures.
Country of PublicationUnited States
LanguageEnglish
FormatPages: 1638
System Entry Date2001 May 13

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